21518409

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{28351}}^1$

素因数の和:28388

約数の個数: 16

約数和(自身を含む): 32661504

約数和(自身を除く): 11143095

約数列:

[1, 3, 11, 23, 33, 69, 253, 759, 28351, 85053, 311861, 652073, 935583, 1956219, 7172803, 21518409]

約数ペア:

[(1, 21518409), (3, 7172803), (11, 1956219), (23, 935583), (33, 652073), (69, 311861), (253, 85053), (759, 28351)]